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Thread: Backwashing pool

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    Backwashing pool

    My pool was recently opened by the pool company. i am a newbie( the pool came with the house)and plan to do my own maintainace. I noticed that after a day or so the water was sluggish coming out of the return. i have been told that i need to backwash. I have a Pentair FNS plus filter which requires 6 lbs of De.

    1. After I perform the backwash rinse cycles, do I have to release air from the air valve of the filter?

    2. Can you add the De directly to the skimmer or do you have to mix the DE with water and the pour it in the skimmer?
    Charlotte Area, NC
    24500 gallon gunite pool
    DE Pentair Plus Model 60 filter

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    Mod Squad jblizzle's Avatar
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    Re: Backwashing pool

    There is an article in the further reading section of Pool School called Use and care of DE filters that will tell you what you need to know.

    Basically,
    1 yes
    2 I prefer to mix with water


    Posted from my Droid with Tapatalk ... sorry if my response is short
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    pwrstrk's Avatar
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    Re: Backwashing pool

    You shouldn't get any air in it but you could always check. Just remember when you backwash you don't get all the DE out. Usually there's about 20 percent left so add accordingly.

    You can put it in right at the skimmer.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: Backwashing pool

    The article states that you remove air when you backwash a pump filter. I have a multi port. Do I still need to remove air?
    Charlotte Area, NC
    24500 gallon gunite pool
    DE Pentair Plus Model 60 filter

  5. Back To Top    #5
    Mod Squad jblizzle's Avatar
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    Re: Backwashing pool

    When you put it back to filter (or rinse) just do a check on the air valve right before you add the DE. Should not really be much, but may as well check.

    Posted from my Droid with Tapatalk ... sorry if my response is short
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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